A Saudi aircraft with 357 passengers on board en route to Riyadh returned to Cairo airport 30 minutes after take off when its cabin crew found out that a crying 14-year-old boy was travelling on his own, a Saudi newspaper said on Thursday. The pilot of Saudia jet radioed the airport control and told them he was heading back after the boy from the Egyptian town of Mansoura was found to be travelling without family company, Sabq Arabic language daily aid. After the plane landed at Cairo airport on Wednesday night, the passengers were told the leave the aircraft, which was searched thoroughly.  “The boy was later subject to investigation to know how he managed to get on the aircraft…the plane took off two hours later,” the paper said.